Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quais são os clubes envolvidos com 16 clubes restantes?
 ###Tabelas: CREATE TABLE teams (teams_id AUTO_INCREMENT PRIMARY KEY, Round VARCHAR, Clubs remaining INT, Clubs involved INT, Winners from previous round VARCHAR, New entries this round VARCHAR) CREATE TABLE doubles_runner-ups_6 (doubles_runner-ups_6_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Tournament VARCHAR, Surface VARCHAR, Partnering VARCHAR, Opponents in the final VARCHAR, Score VARCHAR) CREATE TABLE 2011_team (2011_team_id AUTO_INCREMENT PRIMARY KEY, Player VARCHAR, Position VARCHAR, School VARCHAR, Hometown VARCHAR, College VARCHAR) CREATE TABLE discography_-_original_releases (discography_-_original_releases_id AUTO_INCREMENT PRIMARY KEY, Year INT, Song (s) VARCHAR, Producer (s) VARCHAR, Written By VARCHAR, Artist VARCHAR, Title/Label VARCHAR) CREATE TABLE last-place_couples_average_ranks (last-place_couples_average_ranks_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Celebrity VARCHAR, Professional Partner VARCHAR, Season INT, Average INT)  
SELECT Clubs involved FROM teams WHERE Clubs remaining = 16